<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
    var arr = [];
    for(var i=0;i<10;i++){
        arr[i] = function(){
            console.log(i)
        }
    }
    arr[5]();
    

    var tmp = 1;
    const test = () => {      
        console.log(tmp) 
        if(false){
            var tmp = 2;
        }        
    }
    test()
</script>
</html>